Improvement in sewing-machines



T. J. lHALUGANl Sewing Machine.'

Parented .lune 2; 1863.

UNITED STATES PATENT Ormea.

THOMAS J. HALLIGAN, oF NEW YORK, iv. Y.

IMPROVEMENT IN s tawlNG,Mwst-inves.l

Specication forming part of Letters Patent No. 38,740, dated June r2, 1862i.'

.'o all lwhom it may concern.:

Be it known that I, THOMAS J.HALL1GAN, of the city, county,and'State of New York,have invented certain neuand useful Improvements in Sewing-Machines; and I do hereby declare that the following is afnll, clear, and exact dey scription of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure lis aback view of a machine with myimprovements. Fig. 2 is a vertical section` which a shuttle is used; and it consists, first,

in an improved combination of mechanism for driving the shuttle and feed mechanism, whereby the machine is much simplified.

To enable others skilled inthe art to make and use my invention, I will proceed to -de scribe its construction and operation.

A is the bed-plate, audB a hollowpost erected thereon to support the hollow stationary arm O, which sustains the needle-bar guide D.

E is the main shaft of the machine, extending horizontally through the post B and arm U, and having at its front end a crank, a, for

driving the needle-bar F, the wrist of the said crank working in a slot, b, in a plate, G, attached to the said bar. The needle-bar, besides carrying the needle n, carries an awl,p, which in sewing leather is employed to make holes for the passage ofthe needle, the said awl being arranged in front of the needle and making the holes in that portion ot' the leather which has not yet been brought to the needle by the feed-motion.

H is a horizontal rockshaft for operating the shuttle, and arranged in suitable bearings under the bed-plate parallel with the main shaft E yand deriving motion from an eccentric, I,on the main shaft E, the said eccentric being connected by a rod,l, with an arm, H,o11 the end of the 'rock-shaft farthest from the shuttleraceway J, to which the rock-shaft is arranged transversely. Atthe end of the rock-shaft next tie-carrier K, and so drives the shuttle by thel oscillating movement ot the rock`shattg At a H carries the 4cam L, by which .the operation ofthe feed is produced. The feed is y what is known as a wheel teed.

M is the feed-wheel, havinga projecting rim, d, on its outer vside to be operated vupon by a grimiing-dog, N, which has a notch cut in it to tit easily upon the said rim. This 'dog is attached by a link, e, to the short arm P ot a rock-shaft, P, which is arranged parallel with the rock-'shaft H in suitable bearings at the back of the machine. This rock-shaft P carries, also, a longer arm, P2, situated under the cam L on the rock-shaft H, and the said arm P2 has applied to it a spiral spring,f, which acts to raise it after it has been depressed by the cam L, such depression taking place once in every revolution of the main shat't E, and causing at the same timethedepression of the arm Pand the dog N, and by that means cans ing the dog to grip the rim d ot' the feed-wheel i and turn it in the direction of the arrow shown in Fig. 2. e

gis a spring attached lto one ot' the fixed bearings ot' the rock-shaft P and pressing up against the dog N for the purpose of making the dog slip freely upon the rim a when it is raised by the action of the spiral spring f on the arm P2A as the face ot' the c'am recedes from the said arm. lated by a screw, It, screwed into the bottoni ofthe bed-plate A in such position as to serve as a stop to the arm l as it is raised bythe springf.

Sis thetake-up of the needle-bar guide D yby a xed fulcrum, h. The-needle-thread passes through an eye iu the longer arm of the lever, and the shorter arm is connected by a rod,z', with a rigid stud,

j, attached to the plate G on the needle-bar", and the necessary movement of the said lever to take up the slack of the needle-thread as the, needle rises is produced by the movement ot' the needle-bar.

T, Figs.3,4,5 and 6,is the body of the shuttle,

made ofthe usual form, except that in its upper sideithere is a wide opening,s, across which there is arranged a round bar or roller, u, oc-

short distance from the arm H2, the rock-shaft' The length of the feed is regulever, attached to the back cnpyingaxed position transverse to thelength which is hinged within the body, and which is ofthe shuttle.

U is the bobbin, represented in Figs. 3, 3*, and4asarranged with its axis transverse to and in Figs. 5 and 6 with its axis parallel with the length of the shuttle. ln both applications ot the bohhin lriction is produced upon the journals or male centers at the end of the bohbin. Thetransversely-arranged bobbin has the bea-rings t'oritsjournals in two stoutsprings, V V', which are hinged together at one end as shown at 1' in Figs. 3 and 3*, and secured together at thel other by a clamping-screw, k, passing through the end of one and screwing into the other. The springVis lirmlysecured to the inside ofthe back of the body A; but the other one, which is next the open face ot' the shuttle, is free to open when the screw la is taken out. to permit the insertion and re moval of the bobbtn. By screwing in the screw more or less after the bobbin has been put in place the springs V V are made to press upon the journalsin a greater or lessdegree, and produce a greater or less degree of friction thereon for the purpose of producing tension on the shuttle-thread. The screw cis arranged with its head 'opposite-the open face of the shuttle, that it may be reached by a` screw-driver to adjust the tension of the shutf tlc-thread. The longitudinally-arranged bobhin has one of its'jonrnals arranged in aiixed hearing in the inside of the body of the shuttle andthe otherin a bearing in a piece, 7,

pressed against the journal to produce friction upon it to regulate the tension ot" the thread by means of a screw, m, screwing through the end ofthe shuttle. In both of Vthese shuttles the thread passes from the bobbin over and once ,around the bar or roller n, which guides itinsucha manner as to allow it to be delivered freely from the shuttle, the necessary tension being almost entirely produced upon the journals. rlhe object of the openings is to expose the bar or rolleil nand enable the thread to be easily placed around the' bar fn. The longitudinal arrangement of the bobbin will serve Very well for sewing cloth but for the use of waxed thread for sewing leather I prefer the transverse arrangement, which allows the thread to pass oi' more freely.

WhatI claim as my invention, and desire to secure by Letters Patent', is-

The combination ofthe rock-shaft H, carrying,r an arm, H2, and a cam, L, the rock-shaft P, carrying arms P2 P and aidog, N, and the springsfand g, the whole arranged and applied in relation to each other and in connection` with the shuttle-carrier and feedwheel, substantially as and for the purpose herein Specified.

T. J. HALLIGAN.

Witnesses M. 5.V PARTRlDGE, DANIEL ROBERTSON. 

